ceramics

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Transcript of ceramics

Hand Building Techniques- Ceramics is the art of making pottery by shaping clay and firing it at a high temperature.Wedging- The first step to making any piece of pottery is wedging. Wedging is like kneading. You start with a ball of clay and push it down and forward with your palms then roll it back to you and repeat that for around a minute.

- Wedging forces out any air bubbles which would later expand while being fired and cause your pottery to crack.AttachmentPotter's WheelBy: Bri'el HillCERAMICS - The uses of ceramics are almost endless. The most common use today, are cups, bowls, and vases.GlazingFiringToolsCeramics and Their Uses- People have used ceramics dating all the way back to 24,000 BC. They started out making animal and human figurines.- To fire ceramics you use a kiln, which is a type of oven that can heat up to around 1800 F. The heat causes a chemical change in clay making it hard.- Slabs- A thick piece of clay rolled out by a slab roller.- Coils- Pieces of clay rolled out into long strands.-Extruding- using and extruder to make long hollow shapes that you can attach to a slab.- Pinch Pots- Pinching the sides upward while rotating to keep the same thickness.-Bisque Firing- Is the first of two firings. Its fired at a lower temperature to make pottery less fragile and to remove all of the moisture.-Glaze Firing- is the second firing. it's done at a higher temperature. It heats the piece of pottery and the glazes to maturity- 10,000 years later as community's were established tiles were made in India and Mesopotamia.-The first functional use of ceramics was storing food and water, which was around 10,000 BC.- It's like liquid glass. when you apply it is a liquid and after it's fired the chemical reaction makes it glossy.- Glaze- a glossy coating that has been melted on to the ceramics surface.- Before glazing you want to make sure that you wipe down the pottery with a wet sponge. If not the glaze with have a hard time sticking.- Before dipping your piece in the glaze make sure you stir it to make sure all of the chemicals are mixed.- When attaching multiple pieces of clay together there's a few things that need to be done.- first you want to make sure the clay is not too wet , if it is it will fall right over. It needs to be firm and able to stand on it's own.- Next you need to score the clay, which means you make tiny grooves where you want the clay to be attached.- After scoring you want to put slip on the part that you scored. Slip is watered down clay, almost like mud- Slip acts like glue so the pieces will stay attached after being fired.Pottery wheel-Potter's wheel- A machine used for shaping round ceramic ware.-Throwing- creating ceramic shapes on the potter's wheel.- The first step in throwing is centering which is a technique used to move the clay to a symmetrical rotating axis in the middle.- After centering The first thing you do is make a whole in the center with your middle and index finger. Continue that until it's wide enough to work with.- Next you want to start pulling. Pulling is when you pull the clay up making the clay taller.- You start with one hand on the inside and one on the outside making sure both hands are at the base. - Then you make and indent on the outside and gradually pull both hand moving at the same time .- tools for shaping- tools fortrimming-wire cutter-rib-serrated rib- Painting wax on the bottom prevents ceramics from fusing to the kiln shelf when fired.-After each pull you should smooth out the rim withyour finger so everything stays even.